Merck & Co., Inc. — Director's Dealing 2020

May 6, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co., Inc. (MRK)
CIK: 0000310158
Period of Report: 2020-05-04

Reporting Person: Karachun Rita A (Sr. VP Fince-Global Controller)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-05-04	Common Stock	M	1212	$77.67	Acquired	26714.972	Direct
2020-05-04	Common Stock	F	597	$77.67	Disposed	26117.972	Direct
2020-05-05	Common Stock	M	3283	$76.86	Acquired	29400.972	Direct
2020-05-05	Common Stock	F	1617	$76.86	Disposed	27783.972	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-05-04	Restricted Stock Unit	$	M	1212	Disposed	2021-05-04	Common Stock (1212)	Direct
2020-05-05	Restricted Stock Unit	$	M	3283	Disposed	2020-05-05	Common Stock (3283)	Direct

Footnotes

F1: Holdings include shares acquired in dividend reinvestment transactions.

F2: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.

F3: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/4/2019, 5/4/2020 and 5/4/2021.